A program of full-scale and model experiments for the determination of hull damping coefficients is outlined. A literature survey discusses available data for ship vibration damping, and assesses analytical and experimental techniques used in the past. Existing ship damping data have proven to be inadequate for making reliable vibration predictions. A scheme is discussed for experimentally isolating the damping coefficients associated with each important mode of vibration, as well as the breakdown of the total damping into its separate components (structural, cargo, and hydrodynamic), and the determination of the distribution of the damping along the ship. Excitation devices and analytical methods for reducing the experimental data are discussed, along with specific application to two ships (a 74000 ton Great Lakes ore carrier, and a 30000 ton container ship). (Author)
Experimental program for the determination of hull structural damping coefficients
Experimentelles Programm fuer die Bestimmung der Daempfungsbeiwerte fuer Schiffskoerperkonstruktionen
US Government Reports ; Sep ; 1-85
1981
85 Seiten
Report
English